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near-net shape casting

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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005296
EISBN: 978-1-62708-187-0
... such as near-net shape casting, tundish metallurgy, and pouring stream protection. The article discusses the use and capabilities of different molds for steel continuous casting, including thin-wall tube-type molds, solid molds, and plate molds. The article explains the methods for enhancing productivity...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006498
EISBN: 978-1-62708-207-5
... Abstract Semisolid casting is a near-net shape manufacturing process capable of producing thick- and thin-walled complex-shaped components having excellent mechanical and functional performance. This article begins with a discussion on the history of semisolid processing and the advantages...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001050
EISBN: 978-1-62708-161-0
... in the process is the removal of melt contained oxygen by means of a reaction with carbon to form carbon monoxide. A number of casting processes can provide near-net shape superalloy cast parts, but essentially all components are produced by investment casting. The solidification of investment cast superalloy...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003728
EISBN: 978-1-62708-177-1
... of above 1" at room temperature and reasonable room temperature ductility in the as-cast condition. Finally, it provides information on the microstructures produced through various near-net shape manufacturing processes. directional solidification ductility grain refinement heat-resistant titanium...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006140
EISBN: 978-1-62708-175-7
... is still two to three times higher than that of the cast ingot, the applications are still limited. The advantages of HIP can be revealed only by introducing its shaping potential through manufacturing complex, “net or near net shape (NNS)” parts, which eliminate the expensive and laborious operations...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005187
EISBN: 978-1-62708-187-0
... be difficult and expensive to machine. High-pressure die casting and its variations also provide near-net shape castings but require much more expensive tooling so are generally warranted only for high annual volume requirements. The sand and permanent mold processes readily accommodate disposable internal...
Book Chapter

By G. Keough
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005203
EISBN: 978-1-62708-187-0
..., was originally developed in the early 1950s by the U.S. Bureau of Mines in Albany, Oregon ( Ref 1 , 2 ). Both methods are used to melt significant quantities of contamination free titanium for ingots or near net shape castings. Because the processes are used to melt reactive metals, they are normally carried...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003985
EISBN: 978-1-62708-185-6
... be cast to the near-net die shape so little machining is necessary. As an alternative to casting a complex NNS die, one might cast a less complex die that can be machined to the final NNS configuration to reduce cost and lead time. This is quite beneficial for the forging shapes that are not completely...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005339
EISBN: 978-1-62708-187-0
... unidirectional pressure infiltration of fiber preforms or particle beds in order to produce void-free, near-net shape castings of composites. Aluminosilicate fiber-reinforced aluminum alloy pistons for use in heavy diesel engines have been produced using squeeze casting. A considerable amount of work has been...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005337
EISBN: 978-1-62708-187-0
...-shape or near-net-shape technologies to make titanium alloy components more competitive ( Ref 3 ). These titanium net-shape technologies include powder metallurgy (P/M), superplastic forming (SPF), precision forging, and precision casting. Precision casting is by far the most fully developed...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004024
EISBN: 978-1-62708-185-6
... ). Fig. 8 Microstructures of tool steel (a) cast and (b) spray-formed Radially Constricted Consolidation (RCC) Process <xref rid="a0004024-ref12" ref-type="bibr">(Ref 12)</xref> The RCC process ( Fig. 9 ) incorporates the best characteristics of three near-net-shape processes: casting...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006042
EISBN: 978-1-62708-175-7
... sensitive to residual porosity, and HIP PM materials typically have excellent fatigue resistance. Current HIP PM technology enables the production of both simple and complex net and near-net shapes. Thus, the HIP PM process route offers an alternative to casting and forging in metal parts production...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006488
EISBN: 978-1-62708-207-5
... or by solid-state methods. Two major advantages of the infiltration method are that near-net shape components can be cast, and complex preforms (e.g., three-dimensional fiber weaves) can be used to produce composites having unique reinforcement architectures. The various solid-state fabrication methods...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005509
EISBN: 978-1-62708-197-9
..., and manufactured into a near-net shape using commercial Ti-6Al-4V powder. The casing, as shown in Fig. 5 , consists of an axial-symmetric cylindrical body with two bosses, two edge flanges, two body rings, and two reinforced ribs. The whole design and manufacturing process involved the initial prediction...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006142
EISBN: 978-1-62708-175-7
..., to a large extent, as a near net-shape process offering remarkable cost advantage over traditional, ingot based metalworking processes. Application of PM technology continues to expand, with growth rates faster than other metalworking technologies. Powder Metallurgy processed components are being used...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006526
EISBN: 978-1-62708-207-5
... Abstract Aluminum products such as fasteners and automotive components are often produced by cold extrusion because it facilitates high volume production of near-net-shape parts. This article describes the cold extrusion process for aluminum alloys and the associated requirements for tooling...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005632
EISBN: 978-1-62708-174-0
... Abstract Laser deposition involves the articulation of a laser beam and the introduction of material into the beam path to fuse the material onto a substrate or into a functional shape. It can be divided into two broad categories: cladding and near-net shape processing. This article provides...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005611
EISBN: 978-1-62708-174-0
... Abstract This article focuses on the use of electron beam (EB) for near-net shape processing based on the wire feed material-delivery method. EB deposition processes start with a 3-D model designed in a computer-aided design (CAD) environment, where the deposition path and process parameters...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001082
EISBN: 978-1-62708-162-7
... of the metal, fabricating costs, and the metal removal costs incurred in obtaining the desired final shape. As a result, in recent years a substantial effort has focused on the development of net shape or near-net shape technologies to make titanium alloy components more competitive ( Ref 3 ). These titanium...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003972
EISBN: 978-1-62708-185-6
.... In addition, the metallurgical changes in hot working are much different from those in cold working of the material. Benefits and Disadvantages of Deformation Processes Geometric Features A major benefit of deformation processing is the ability to produce a near-net shape. Since hard tooling is used...